Effects of Sodium Dodecyl Sulphate on Post-thaw Dog Semen Quality during in vitro Incubation at 39°C and 22°C     

AI Peña  F Barrio  LA Quintela  PG Herradón 《Reproduction in domestic animals》1998,33(6):393-398

  相似文献   

Suitability of enzymatic hydrolyzates of extracted gluten from fresh pasta by-product used as bread improvers     

Soumaya Zouari Ellouzi  Dorra Driss  Sameh Maktouf  Monia Blibech  Manel Affes  Hounaida Kamoun  Semia Ellouze Chaabouni  Raoudha Ellouze Ghorbel 《Journal of Cereal Science》2014

Gluten extracted from fresh pasta by-products (PG) was enzymatically hydrolyzed by two different commercial proteases (Alcalase 2.4 L and Pancreatin) to different degrees of hydrolysis (DH 2.0, 4.0 and 8.0%). Commercial gluten (CG) was used as reference. The evaluation of functional properties of hydrolyzates from pasta gluten (PGH) and commercial gluten (CGH) showed that Pancreatin hydrolyzates had the highest emulsifying capacities. Regarding the foaming activity, all hydrolyzates performed better than unhydrolyzed gluten. PGH and CGH were added to wheat flour (1%) and their effects on dough rheology were studied. Most hydrolyzates with DH 8% increased dough thermal stability and elasticity during mixing, accelerated the denaturation rate of the protein network, and delayed the gelatinization speed of starch as the temperature increased. Texture profiles and specific volumes of breads from low quality wheat flour with added Pancreatin hydrolyzates (DH 8%) were comparable to those of breads from high quality flour. This showed the potential suitability of PGH and CGH as bread improvers.  相似文献   

Comet encke: radar detection of nucleus     

Kamoun PG  Campbell DB  Ostro SJ  Pettengill GH  Shapiro II 《Science (New York, N.Y.)》1982,216(4543):293-295

The nucleus of the periodic comet Encke was detected in November 1980 with the Arecibo Observatory's radar system (wavelength, 12.6 centimeters). The echoes in the one sense of circular polarization received imply a radar cross section of 1.1 +/- 0.7 square kilometers. The estimated bandwidth of these echoes combined with an estimate of the rotation vector of Encke yields a radius for the nucleus of l.5(+2.3)(-1.0) kilometers. The uncertainties given are dependent primarily on the range of models considered for the comet and for the manner in which its nucleus backscatters radio waves. Should this range prove inadequate, the true value of the radius of the nucleus might lie outside the limits given.  相似文献   

Identification of a blue photoluminescent composite material from a combinatorial library     

J Wang  Y Yoo  C Gao  I Takeuchi  X Sun  H Chang  X Xiang  PG Schultz 《Science (New York, N.Y.)》1998,279(5357):1712-1714

A quaternary combinatorial masking strategy was used in conjunction with photolithography to generate compositionally diverse thin-film phosphor libraries containing 1024 different compositions on substrates 2.5 centimeters square. A parallel imaging system and scanning spectrophotometer were used to identify and characterize compositions in the library with interesting luminescent behavior. Optimal compositions were identified with the use of gradient libraries, in which the stoichiometry of a material was varied continuously. This process led to the identification of an efficient blue photoluminescent composite material, Gd3Ga5O12/SiO2. Experimental evidence suggests that luminescence in this material may arise from interfacial effects between SiO2 and Gd3Ga5O12.  相似文献   

Lunar Fe and Ti abundances: comparison of lunar prospector and clementine data   总被引：3，自引：0，他引：3  

RC Elphic  DJ Lawrence  WC Feldman  BL Barraclough  S Maurice  AB Binder  PG Lucey 《Science (New York, N.Y.)》1998,281(5382):1493-1496

The Lunar Prospector neutron spectrometer data correlate well with iron and titanium abundances obtained through analysis of Clementine spectral reflectance data. With the iron and titanium dependence removed, the neutron spectrometer data also reveal regions with enhanced amounts of gadolinium and samarium, incompatible rare earth elements that are enriched in the final phases of magma crystallization. These regions are found mainly around the ramparts of the Imbrium impact basin but not around the other basins, including the much larger and deeper South Pole-Aitken basin. This result confirms the compositional uniqueness of the surface and interior of the Imbrium region.  相似文献   

Report on the 43rd Annual Meeting of the DPG-Working Group Nematology     

Daub  Matthias  Hakl  Ulrike  Molendijk  Leendert PG  Schomaker  Corrie  Been  Thomas H  van Beers  Thea G  Jivishova  Sevda  Jivishov  Emil  Keusgen  Michael  Bluemel  Roman  Fischer  Daniel  Grundler  Florian MW  Reuther  Marie  Cappel  Sabrina  Bauer  Harald  Lang  Christian  Watrin  Cliff  den Nijs  Loes JMF  Van Bruggen  Anne-Sophie  Karssen  Gerrit  Kiewnick  Sebastian  Büchler  Urs  Roth  Irma  Frey  Jürg 《植物病害和植物保护杂志》2015,122(4):189-193

Journal of Plant Diseases and Protection -  相似文献   

Genome evolution following host jumps in the Irish potato famine pathogen lineage     

Raffaele S  Farrer RA  Cano LM  Studholme DJ  MacLean D  Thines M  Jiang RH  Zody MC  Kunjeti SG  Donofrio NM  Meyers BC  Nusbaum C  Kamoun S 《Science (New York, N.Y.)》2010,330(6010):1540-1543

Many plant pathogens, including those in the lineage of the Irish potato famine organism Phytophthora infestans, evolve by host jumps followed by specialization. However, how host jumps affect genome evolution remains largely unknown. To determine the patterns of sequence variation in the P. infestans lineage, we resequenced six genomes of four sister species. This revealed uneven evolutionary rates across genomes with genes in repeat-rich regions showing higher rates of structural polymorphisms and positive selection. These loci are enriched in genes induced in planta, implicating host adaptation in genome evolution. Unexpectedly, genes involved in epigenetic processes formed another class of rapidly evolving residents of the gene-sparse regions. These results demonstrate that dynamic repeat-rich genome compartments underpin accelerated gene evolution following host jumps in this pathogen lineage.  相似文献   

Signatures of adaptation to obligate biotrophy in the Hyaloperonospora arabidopsidis genome   总被引：2，自引：0，他引：2  

Baxter L  Tripathy S  Ishaque N  Boot N  Cabral A  Kemen E  Thines M  Ah-Fong A  Anderson R  Badejoko W  Bittner-Eddy P  Boore JL  Chibucos MC  Coates M  Dehal P  Delehaunty K  Dong S  Downton P  Dumas B  Fabro G  Fronick C  Fuerstenberg SI  Fulton L  Gaulin E  Govers F  Hughes L  Humphray S  Jiang RH  Judelson H  Kamoun S  Kyung K  Meijer H  Minx P  Morris P  Nelson J  Phuntumart V  Qutob D  Rehmany A  Rougon-Cardoso A  Ryden P  Torto-Alalibo T  Studholme D  Wang Y  Win J  Wood J  Clifton SW  Rogers J  Van den Ackerveken G  Jones JD 《Science (New York, N.Y.)》2010,330(6010):1549-1551

Many oomycete and fungal plant pathogens are obligate biotrophs, which extract nutrients only from living plant tissue and cannot grow apart from their hosts. Although these pathogens cause substantial crop losses, little is known about the molecular basis or evolution of obligate biotrophy. Here, we report the genome sequence of the oomycete Hyaloperonospora arabidopsidis (Hpa), an obligate biotroph and natural pathogen of Arabidopsis thaliana. In comparison with genomes of related, hemibiotrophic Phytophthora species, the Hpa genome exhibits dramatic reductions in genes encoding (i) RXLR effectors and other secreted pathogenicity proteins, (ii) enzymes for assimilation of inorganic nitrogen and sulfur, and (iii) proteins associated with zoospore formation and motility. These attributes comprise a genomic signature of evolution toward obligate biotrophy.  相似文献   

Optimization of lipase-catalyzed synthesis of acetylated tyrosol by response surface methodology     

Aissa I  Bouaziz M  Ghamgui H  Kamoun A  Miled N  Sayadi S  Gargouri Y 《Journal of agricultural and food chemistry》2007,55(25):10298-10305

The ability of a noncommercial immobilized lipase from Staphylococcus xylosus (SXLi) to catalyze the transesterification of tyrosol and ethyl acetate was investigated. Response surface methodology was used to evaluate the effects of the temperature (40-60 degrees C), the enzyme amount (50-500 UI), and the ethyl acetate/hexane volume ratio (0.2-1) on the tyrosol acetylation conversion yield. Two independent replicates were carried out under the optimal conditions predicted by the model (reaction temperature 54 degrees C, enzyme amount 500 UI, and volume ratio ethyl acetate/hexane 0.2). The maximum conversion yield reached 95.36 +/- 3.6%, which agreed with the expected value (96.8 +/- 3.7%). The ester obtained was characterized by spectroscopic methods. Chemical acetylation of tyrosol was performed, and the products were separated using HPLC. Among the eluted products from HPLC, mono- and diacetylated derivatives were identified by positive mass spectrometry. Tyrosol and its monoacetylated derivative exert similar antiradicalar activity on 2,2-diphenyl-1-picrylhydrazyle.  相似文献   

Comparison of Two Doses of the GnRH Antagonist, Acyline, for Pregnancy Termination in Bitches     

C Valiente  Y Corrada  PE de la Sota  PG Blanco  D Arias  C Gobello 《Reproduction in domestic animals》2009,44(S2):156-159

Gonadotropin-releasing hormone (GnRH) antagonists are particularly useful when a rapid inhibitory effect on the gonadal axis is required. The aim of this study was to test the efficacy and clinical safety of a low and high dose of the third generation GnRH antagonist, acyline, on pregnancy termination in female dogs. The effect of the antagonist on the progesterone (P₄) serum concentration was also described. Twenty-one mid-pregnant bitches were randomly assigned to a single subcutaneous (SC) dose of a placebo (PLACE; n = 7), a low (ACY-L; 110 μg/kg; n = 6) or high (ACY-H; 330 μg/kg; n = 8) dose of acyline. The animals were followed up for 15 days. All ACY treated but no placebo-treated animals terminated their pregnancy by abortion (p < 0.01). The ACY-L and ACY-H groups interrupted their pregnancy 7 ± 1.9 and 6.4 ± 1.3   days after treatment, respectively (p = 0.7). A significant interaction between treatment and day was found (p < 0.01) for P₄ serum concentrations when PLACE was compared with both ACY groups. No difference was found for this hormone between both ACY groups (p > 0.05) where P₄ diminished throughout the study. The decreasing rate varied among animals and was closely related to the time of abortion when P₄ reached basal concentrations. In PLACE animals, gestation progressed normally and P₄ did not change throughout the study (p > 0.05). None of the bitches presented side effects. It was concluded that acyline safely terminated mid-pregnancy by permanently decreasing P₄ serum concentrations.  相似文献